Lead ?

[SgtDog0311]

Sorry I took so long to get back… Don't give up on me - just had a heap of reloading to do this week for summer travels.

Wayne, sorry I am not clearer… you are right, I am referring to ” transition step angle from the chamber to the bore”. Great contrast between your two 40-65s and perfect to help me understand here. I’m still working on that part. As for your point about matching up your cartridge with the chamber I understand what you are saying. In this case I’m limited somewhat. The mold I’m using is gonna work fine but is not what I’d have asked for given this chamber. More time to spend on that one. For now I don’t have a grease groove to line up ahead of the case mouth and need to make it shoot with what I have, an LBTLFN for my Marlin 1893. I size it to groove and seat for ever so slight an imprint on the ogive.

On your last statement about rings… don’t want to sound like I’m disagreeing here since I don’t know anything for certain enough to disagree (and I’m the one with questions)… but I don’t understand why you think I should not have lead rings. Seems to me that is exactly what I’d get. If the bullet upset serves to fill the free bore, that’d be the shooter’s side of our transition step angle, and since in our case that angle is fairly abrupt; and it’s being propelled forward at the same time, it seems logical that lead could get shaved vs swaged as it went forward. I thought that was why we were suggesting the lube groove be exposed to help fill that space. I just want to understand it… if I should be able to shoot a groove diameter bullet or even bigger without lead rings then I want to understand why I’m not. And another thing I’m wondering is – might it be so un-used as for that angle to still be sharp enough and hold some possibility of improving (the edge getting a little softer) as it’s shot more?

Once again, thanks Kurt for posting that 40-65 Cast. So the chamber to bore angle is 45degrees and the Lead 1.5 degrees if I'm following correctly So would it be a mistake to use a throat reamer to make that a gentler angle, much like your 40-65? I’m not in a rush but like to ponder ahead. I don’t want to plant any seeds in my brain that would spoil the chamber for black powder.